Oil-burner



T. L. DAVENPORT.

OIL BURNER.

APPLICATION FILED APR. I9. I920.

Patented Oct. 18, 1921` PATENT OFFICE.

THOMAS L. DAVENPORT, OF EVERETT, WASHINGTON.

OIL-BURNER.

Specification of Letters Patent.

Patented Oct. 18, 1921.

I Application led April 19, 192,0. Serial No. 375,164.

T0 all whom. t may concern Be it known that I, THOMAS L. DAVEN- roii'r, citizen of the United States, residing in Everett. in the county of Snohomish and State of vWashington, have invented a certain new and useful Improvement in Oil- Burners, of which the following is a specilication.

My invention relates to improvements in oil burners adapted to burn fluid fuel such as crude oil, kerosene,'gasolene or other mineral oil products, the invention relating more particularlyto the type of oil burners adapted for installation and operation in the fire-boxes of steam boilers or furnaces `and the object of my invention is to provide a burner adapted t0 be removably attached to the door of the lire box of a boiler or furnace to swing outwardly with the said door when it is opened to facilitate -the starting of the same and which is further adapted to be inserted within the lire-box when the door is closed.

Another object is to provide a burner einbodying a construction wherein the jets of steam or compressed air under pressure are utilized to create a suction whereby the fluid fuel will be drawn from its source of supply into the mixing chamber of the burner. i

' A further Objectis to provide a burner embodying simplicity and economy inl construction, that is positive and eflicient in operation, that is lreadily accessible and easily cleaned and that will not readily get out of order.

Vit-h the above and other objects in view which will appear asv the description proceeds, my invention resides in the novel construction, combination, adaptation and arrangement ofk parts hereinafter described and claimed. l

I accomplish these objects by devices illustrated in the accompanying drawings,

wherein- Figs. 6 and 7 are views in elevation of twodetails of my invention; and

F ig. 8 is a view in fragmentary vertical section on broken line 8, 8 of Fig. 2.

I iefeiring to the drawings, throughoutwhich like reference numerals indicate like parts, the burner in its present form comprises the cylindrical sections 10 and 11, a coupling nut 12, end caps 13 and 14, a fluid fuel pipe 15, a fluid fuel control valve 16, a steam or air supply pipe 17, a steam valve 18, tubular members 19 and 20, a connecting nipple 21, an attaching plate 22, a metallic block or base 23, U-shaped fuel conduit pipe2s624, a retaining plate 25, and a burner tip The cylindrical sections 10 and 11 are externally threaded at each of their ends and are connected together by the coupling nut 12 to form a continuous cylindrical casing o'f the desired length.

The coupling nut. 12 is provided with an interiorly centrally disposed annular web or partition 27 having an axial opening 28 adapted to register with the bores of the tubular members 19 and 20 and is also provided with arcuate slots 29 adapted to register with the annular passageway 30 formed by the walls of the sections 10 and 11 and the walls of the tubular members 19 and 20.

The cap 13 is threadably engaged on the outer or rear end of the cylindrical casing formed by the sections 10 and 11 and is provided with an outwardly projecting axial boss 31 that is interiorly threaded for the reception of the fluid fuel pipe 15, within which pipe is interposed the fluid fuel control valve 16,

The cylindrical section 10 of the casing is provided with an enlarged chamber 32 having an interiorly threaded boss 33 on one of its sides thereof for the reception of the steam-pipe 17. Interposed in the steam pipe 17 is the steam control valve 18. l

Longitudinally and concentrically disposed within the vcylindrical casing formed by the sections 10 and 11 are the tubular members 19 and 20, the members 19 having flanges 34 formed on one o'f their ends and having their opposite ends externally tapered and provided with longitudinally disposed grooves 35, while the members 2() have flanges 36 formed on one of their ends and have their opposite ends internally the U-shapedl conduit pipes 24.

flared as at 37 to receivethe `tapered and fluted portions 35 of the members 19 when the members 19 and 2O are assembled as shown more clearly in Fig. 2.

To positively retain the tubular members 19 and 2O in their longitudinal and concentric position within the cylindrical casing I have counterbored the ends of the sections 10 and 11 to yform seats for the flanges 34 and 36 on the tubular members 19 and 20 which vare retained in the said seats by the coupling nut 12, and the end caps 13 and 14 as shown more clearly in Fig. 2.

The flanges 34 and 36 adjacent the partition 27 are provided' with arcuate slots 38 which register with the slots 29 in the 'partition 27 and also with the annular passageway 30.

The end cap 14 is threadably engaged on the innerl or forward end of the cylindrical i casing formed by the sections 10 and 11 and The-door 41 is provided with a hole or Y aperture 43 which is `disposed in axial alinement and registers with the bore of the nipple 21.

yIlegistering with the hole 43 is a curved passageway 44 formed in the block 23, which passagewaycommunicates with the leg 45 of A substantially horizontally disposed semi-circular passageway 46 formed in the block 23 connects the legs 47 and 48 ofthe conduit pipes 24 while a substantially vertical disposed semi-circular passageway 49 formed in the block 23 'connects the legO of the .conduit pipes 24 with theburner tip 26, which burner tip is threadably disposed in the forward and lower face portion of the block 23., The burner tip 2G 'is providedwith a slot 51 for the emission or gas.`

. To'providean eliicient means to secure the ofthe vapor conduit pipes 24 in an angular position on Vofl holes 52 for the reception of the rear ends ofthe conduit pipes 24, Vthe saidends being flared or expanded and being adapted to seat-in countersunl portions of the holes 52v formed on theinuer side of the plate 25, as shown more clearly in Fig.V 3. The plate is fixedly secured to the block 23 by cap screws :In practice I have found it practical to gradually increase the diameter of the longitudinal axial passz-igeway or mixing chamber 55 in a forward direction from the rear end of the rear-most tubular member -19 to a point adjacent the connecting nipple 21 to facilitate the suction action-.cf the jets of steam or air on the fluid fuel 'in drawing the same from its source of supplyand also Vto expedite the breaking up and mixing of the fuel with the steam or air va'porization and'COmbuStiOH.

Tostart thel burner the door 41 is opened and piece of oiled waste or other suitable material is placed upontheburner'tip 26 and ignited to Ipreheat the conduit pipes 524, the door 41 is then closed to insert the burner within the lire-box, the fluid fuel control valve 16 is opened, the steam control valve 18 is also opened admittingsteam into the chamber 32 and the annular passageway 30,V said steam passing therefrom at a high ve-; locity through the grooves35 in. the members 19 into the passageway or mixing chamber 55 in the form of jets-thereby. creating a suction thereinina forwardfdirection, as indicated by the arrows in Fig.k 2, whichsuction will draw-the fluid fuel from its source of Supply into the miningchamber where itV is broken up by the said jets andthoroughly mixed with thesteamor airprior to beingl carried by the velocity of the steam into thev conduit pipes 24. f -m j As the conduit pipes 24 become heatedthe fuel contained therein lis vaporized Aand passes to the burner tip 26 where itis-ig# nited by the burning oiled waste. The valves 16 and-18 may be regulatedto obtainl the amount ofq-fuel'and lthepsiiction required to maintain a liameoftlie desired intensity as will be readily understood. .Y

From the foregoing description'taken in connectionwith the accompanying drawprior to its' ings, the advantagesv ofthe construction and of the method of operationV willbereadily understood Vby those -skilled in thev art to whichethe inventionpertains, and whilezI have described` the principle of operation'of the invention', [togetherl with'q'the Vdevice which I now considertobe the'best/'embodi ment thereof, I desire to have it understoodV that the device shown is merely illustrative andthat such changes may be inadewhen desiredt as are withinthescope of the following claimsg I f Z What I claim is; Y i.

In combinationwith an oilfburner, cfa vacuum jet oilfeed mechanism comprising a plurality of vacuumjets adapted to be se-f cured .together in' end .to end! relation, each of saildjets comprising anlouterA .casing pro- 1 130 vided with a cylindrical passageway that is counterbored at each end to form a seat, a tubular member having a perforated flange on one end disposed concentrically within said passageway and adapted to lit within said seat, said tubular member being of less diameter than said cylindrical passageway whereby an annular passageway is formed therebetween and having; one ot its ends internally flared in a rearward direction, another tubular member having a perforated iange on one end adapted to fit within the said seat on the opposite end of said casing, said tubular member being of substantially similar diameter of the first named tubular member and having one of its ends externally tapered and fluted and adapted to be projected within the flaringl end of the first named tubular member in concentric relation thereto to form a plurality of apertures of relatively small area therebetween, an intake conduit for fluid fuel connected with the inlet end of said tubular members, controlling means interposed in said intake conduit, a supply pipe adapted to conduct iuid under pressure into the said annular passageway, controlling means interposed in said supply pipe, and a delivery conduit connecting the outlet end of said tubular members with said burner.

In witness whereof, I hereunto subscribe my name this 10th day of April, A. D. 1920.

THOMAS L. DAVENPORT. 

